Is there a significant gain one can get from SSB HV over LV?

I actually started my first week with Mid volume. T’was really hard for me so I moved to LV1. There were 3 pre-added workouts which I find not enough for me, so I added 1 endurance and 1 recovery workout. Apparently, I mimicked the MV schedule with lower intensity workouts. My question now is, on average, how many watts can be gained through doin’ SSBLV1? Is there like a minimum gain I may expect after LV1? Sorry for I sounded so particular in everything. I’m just that excited on the gains I may get from this training.